Poor Product

Had gifted Apple I phone 4s 32GBP with the imei number is 990001876468190 which stoped working after a while.
I called the company. Amit named person asked me to courier the phone I spent almost 300 and sent the phone. Since o me month he is not responding to my calls nor giving proper response just tells technicians is still work in on the phone
I have almost all the proffs